Question

define acceleration when he the acceleration of a body positive and negative
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Answer 1

Answer:

When an object is speeding up, the acceleration is in the same direction as the velocity. Thus, this object has a positive acceleration. In Example B, the object is moving in the negative direction (i.e., has a negative velocity) and is slowing down.

Answer 2

Explanation:

Acceleration is the rate of change of velocity. Usually, acceleration means the speed is changing, but not always. When an object moves in a circular path at a constant speed, it is still accelerating, because the direction of its velocity is changing.

Acceleration___

a=v-u

t

a= acceleration

v= final velocity

c= intial velocity

t= time

Negative :- when the velocity of a body increases, the acceleration is negative.

Positive :- acceleration of a body is defined as the rate of change in its velocity with time, if it's velocity decreases then it is positive acceleration.